Re: [asus-nb-wmi] thermal device detected by asus-nb-wmi platform driver

[Guenter Roeck <linux@roeck-us.net>]

On 03/20/2014 05:22 PM, Lu, Baolu wrote:
> Hi,
>
> I booted Ubuntu13.10 onto ASUS T100 Tablet and upgraded it with upstream
> kernel (3.14.0-rc7+). There is a thermal device under
> /sys/devices/platform/asus-nb-wmi.
>
> root@t100:~/linux# tree /sys/class/hwmon/
> /sys/class/hwmon/
> ├── hwmon0 -> ../../devices/platform/coretemp.0/hwmon/hwmon0
> └── hwmon1 -> ../../devices/platform/asus-nb-wmi/hwmon/hwmon1
>
> root@t100:/sys/devices/platform/asus-nb-wmi# ls
> cpufv driver hwmon input modalias power subsystem uevent
>
> root@t100:~/linux# sensors
> coretemp-isa-0000
> Adapter: ISA adapter
> Core 0: +38.0°C (high = +90.0°C, crit = +90.0°C)
> Core 1: +38.0°C (high = +90.0°C, crit = +90.0°C)
> Core 2: +39.0°C (high = +90.0°C, crit = +90.0°C)
> Core 3: +38.0°C (high = +90.0°C, crit = +90.0°C)
>
> asus-isa-0000
> Adapter: ISA adapter
> temp1: +6280.0°C
>

Pretty hot ;-). Not your problem, though - it looks like the temperature
is reported in Kelvin and the code converting from Kelvin to degrees C
turns out to be buggy.

> I didn't get any information about thermal interface in
> "Documentation/ABI/testing/sysfs-platform-asus-wmi". Is this a thermal
> sensor? If it's the fact, how can I change the environment so that this
> sensor gives me variable data?
>

I don't think I understand your question. Yes, this is a thermal sensor.
What is it you want to do (in addition to having it report reasonable
temperatures) ?

Guenter